/* 隐藏默认的右键菜单 */  
.menu {  
    display: none;  
    position: absolute;  
    background-color: #fff;  
    border: 1px solid #ccc;  
    z-index: 1000;  
}  
/* 菜单项的样式 */  
.menu-item {  
    padding: 8px 12px;  
    cursor: pointer;  
}  
.menu-item:hover {  
    background-color: #e0e0e0;  
}  